But you say you're just a friend? A day after Us Weekly confirmed that Selena Gomez and Niall Horan were kissing at a birthday party, the two continued firing up romance rumors with yet another night out, this time at Santa Monica Pier over the weekend.

Onlookers on Twitter and Instagram caught the music superstars riding roller coasters and playing boardwalk games together this past Saturday, Dec. 5, while hanging out with a group of friends. For the outing, the One Direction bandmate sported a pair of thick-rimmed frames while Gomez went casual in a black top and pants.

Their outing came just one day after the two were spotted kissing at Jenna Dewan Tatum's 35th birthday party at Bootsy Bellows on Friday, Dec. 4. "Niall and Selena were seen kissing in the middle of the club, in front of everyone," an eyewitness toldUs of the singers, both of whom had performed earlier that day at 102.7 KIIS FM's 2015 Jingle Ball.

Another source added that Gomez, 23, and Horan, 22, "definitely seemed very close and like they were together." But there was more. "Selena and Niall left together," the same insider told Us. "She grabbed his arm on the way out and held onto it."

As previously reported by Us, the songstress ran into the heartthrob at an AMAs afterparty on Nov. 22, and they later caught up over dinner at Nobu Malibu. Gomez, though, is still very much single, according to a source close to the "Same Old Love" hitmaker.

In fact, she's still on great terms with her ex Bieber, who even posted (yet another!) photo of her to his Instagram after Us confirmed that Gomez and Horan had kissed. Bieber, however, is no stranger to posting pictures of gorgeous women on his account. The "Purpose" crooner even asked his millions of followers to help him identify a mystery beauty on Monday, Dec. 7.